/* Base Styles */
:root {
  --primary-color: #2e7d32;
  --secondary-color: #1b5e20;
  --accent-color: #4caf50;
  --light-accent: #c8e6c9;
  --text-color: #333;
  --light-text: #666;
  --white: #fff;
  --light-bg: #f9f9f9;
  --border-color: #e0e0e0;
  --shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Roboto", sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--white);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: var(--transition);
}

a:hover {
  color: var(--secondary-color);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 10px;
  position: relative;
  display: inline-block;
}

.underline {
  width: 80px;
  height: 4px;
  background-color: var(--accent-color);
  margin: 0 auto;
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 50px;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-size: 1rem;
}

.primary-btn {
  background-color: var(--primary-color);
  color: var(--white);
}

.primary-btn:hover {
  background-color: var(--secondary-color);
  color: var(--white);
}

.secondary-btn {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.secondary-btn:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

/* Header Styles */
#header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--white);
  box-shadow: var(--shadow);
  z-index: 1000;
  padding: 15px 0;
  transition: var(--transition);
}

#header.scrolled {
  padding: 10px 0;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

#header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo span {
  color: var(--accent-color);
}

#navbar ul {
  display: flex;
}

#navbar ul li {
  margin-left: 30px;
}

#navbar ul li a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-color);
  position: relative;
  padding-bottom: 5px;
}

#navbar ul li a:hover,
#navbar ul li a.active {
  color: var(--primary-color);
}

#navbar ul li a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

#navbar ul li a:hover::after,
#navbar ul li a.active::after {
  width: 100%;
}

.hamburger {
  display: none;
  cursor: pointer;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--text-color);
  transition: var(--transition);
}

/* Hero Section */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  background-color: var(--light-bg);
  position: relative;
  padding-top: 80px;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hero-text {
  flex: 1;
  padding-right: 30px;
}

.hero-text h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.career-toggle {
  display: flex;
  margin-bottom: 20px;
}

.career-toggle button {
  padding: 8px 20px;
  border: 2px solid var(--primary-color);
  background-color: transparent;
  color: var(--primary-color);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.career-toggle button:first-child {
  border-radius: 50px 0 0 50px;
}

.career-toggle button:last-child {
  border-radius: 0 50px 50px 0;
}

.career-toggle button.active {
  background-color: var(--primary-color);
  color: var(--white);
}

.career-desc {
  font-size: 1.2rem;
  margin-bottom: 30px;
  color: var(--light-text);
  display: none;
}

.career-desc.active {
  display: block;
}

.hero-btns {
  display: flex;
  gap: 15px;
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}

.profile-img-container {
  width: 350px;
  height: 350px;
  border-radius: 50%;
  overflow: hidden;
  border: 8px solid var(--light-accent);
  box-shadow: var(--shadow);
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.scroll-down {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  animation: bounce 2s infinite;
}

.scroll-down a {
  display: block;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.form-status {
  margin-top: 10px;
  font-size: 0.95rem;
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-20px);
  }
  60% {
    transform: translateY(-10px);
  }
}

/* About Section */
.about {
  background-color: var(--white);
}

.about-content {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.about-text {
  flex: 1;
  min-width: 300px;
}

.career-about {
  display: none;
}

.career-about.active {
  display: block;
}

.about-text p {
  margin-bottom: 15px;
  font-size: 1.1rem;
  color: var(--light-text);
}

.about-info {
  flex: 1;
  min-width: 300px;
  background-color: var(--light-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.info-item {
  margin-bottom: 15px;
  display: flex;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.info-title {
  font-weight: 600;
  width: 120px;
  color: var(--primary-color);
}

.info-value {
  flex: 1;
}

.download-cv {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

/* Resume Section */
.resume {
  background-color: var(--light-bg);
}

.resume-nav {
  display: flex;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 10px;
}

.resume-tab {
  padding: 10px 20px;
  background-color: var(--white);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  color: var(--text-color);
}

.resume-tab.active,
.resume-tab:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

.resume-section {
  display: none;
}

.resume-section.active {
  display: block;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  width: 2px;
  background-color: var(--accent-color);
  top: 0;
  bottom: 0;
  left: 20px;
}

.timeline-item {
  position: relative;
  margin-bottom: 50px;
  padding-left: 60px;
}

.timeline-dot {
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: var(--primary-color);
  border-radius: 50%;
  left: 11px;
  top: 0;
  z-index: 1;
}

.timeline-date {
  position: absolute;
  left: 60px;
  top: 0;
  font-weight: 600;
  color: var(--primary-color);
}

.timeline-content {
  background-color: var(--white);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  margin-top: 30px;
}

.timeline-content h3 {
  margin-bottom: 10px;
  color: var(--primary-color);
}

.timeline-content h4 {
  margin-bottom: 15px;
  color: var(--light-text);
  font-weight: 500;
}

.timeline-content ul {
  list-style: disc;
  padding-left: 20px;
}

.timeline-content ul li {
  margin-bottom: 5px;
}

/* Skills */
.skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.skills-category {
  flex: 1;
  min-width: 300px;
}

.skills-category h3 {
  margin-bottom: 20px;
  color: var(--primary-color);
}

.skill-item {
  margin-bottom: 20px;
}

.skill-name {
  margin-bottom: 10px;
  font-weight: 500;
}

.skill-bar {
  height: 10px;
  background-color: var(--border-color);
  border-radius: 10px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background-color: var(--primary-color);
  border-radius: 10px;
}

/* Certifications */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
}

.certification-item {
  background-color: var(--white);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: var(--transition);
}

.certification-item:hover {
  transform: translateY(-5px);
}

.certification-icon {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.certification-item h3 {
  margin-bottom: 10px;
  color: var(--text-color);
}

.certification-item p {
  color: var(--light-text);
}

/* Volunteering */
.volunteering-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
}

.volunteering-item {
  background-color: var(--white);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  text-align: center;
  transition: var(--transition);
}

.volunteering-item:hover {
  transform: translateY(-5px);
}

.volunteering-icon {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.volunteering-item h3 {
  margin-bottom: 10px;
  color: var(--text-color);
}

.volunteering-item p {
  color: var(--light-text);
}

/* Publications Section */
.publications {
  background-color: var(--white);
}

.publications-container {
  max-width: 800px;
  margin: 0 auto;
}

.publication-item {
  display: flex;
  margin-bottom: 40px;
  background-color: var(--light-bg);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.publication-year {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 20px;
  font-weight: 600;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 100px;
}

.publication-content {
  padding: 20px;
  flex: 1;
}

.publication-content h3 {
  margin-bottom: 10px;
  color: var(--text-color);
}

.authors {
  margin-bottom: 10px;
  color: var(--light-text);
  font-style: italic;
}

.journal {
  color: var(--primary-color);
  font-weight: 500;
}

/* Awards Section */
.awards {
  background-color: var(--light-bg);
}

.awards-container {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  justify-content: center;
}

.award-item {
  background-color: var(--white);
  padding: 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  max-width: 500px;
  width: 100%;
  transition: var(--transition);
}

.award-item:hover {
  transform: translateY(-5px);
}

.award-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-right: 20px;
}

.award-content h3 {
  margin-bottom: 10px;
  color: var(--text-color);
}

.award-content p {
  color: var(--light-text);
  margin-bottom: 10px;
}

.award-link {
  color: var(--primary-color);
  font-weight: 500;
  display: inline-block;
}

/* Contact Section */
.contact {
  background-color: var(--white);
}

.contact-container {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}

.contact-info {
  flex: 1;
  min-width: 300px;
}

.contact-item {
  display: flex;
  margin-bottom: 30px;
}

.contact-icon {
  width: 60px;
  height: 60px;
  background-color: var(--light-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 20px;
  color: var(--primary-color);
  font-size: 1.5rem;
}

.contact-text h3 {
  margin-bottom: 5px;
  color: var(--text-color);
}

.contact-text p {
  color: var(--light-text);
}

.social-links {
  display: flex;
  gap: 15px;
  margin-top: 30px;
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: var(--light-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-size: 1.2rem;
  transition: var(--transition);
}

.social-link:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

.contact-form {
  flex: 1;
  min-width: 300px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  font-family: "Roboto", sans-serif;
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-group textarea {
  height: 150px;
  resize: vertical;
}

.form-status {
  margin-top: 20px;
  padding: 10px;
  border-radius: 5px;
  display: none;
}

.form-status.success {
  background-color: #d4edda;
  color: #155724;
  display: block;
}

.form-status.error {
  background-color: #f8d7da;
  color: #721c24;
  display: block;
}

/* Footer */
.footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 30px 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--white);
}

.footer-links a:hover {
  color: var(--light-accent);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  right: 30px;
  bottom: 30px;
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.back-to-top.active {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--secondary-color);
  color: var(--white);
}

/* Responsive Styles */
@media screen and (max-width: 992px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-text {
    padding-right: 0;
    margin-bottom: 40px;
  }

  .career-toggle {
    justify-content: center;
  }

  .hero-btns {
    justify-content: center;
  }

  .profile-img-container {
    width: 250px;
    height: 250px;
  }

  .about-content {
    flex-direction: column;
  }

  .timeline::before {
    left: 31px;
  }

  .timeline-dot {
    left: 22px;
  }
}

@media screen and (max-width: 768px) {
  .hamburger {
    display: block;
  }

  #navbar ul {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: var(--white);
    width: 100%;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
  }

  #navbar ul.active {
    left: 0;
  }

  #navbar ul li {
    margin: 15px 0;
  }

  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .hero {
    height: auto;
    padding: 150px 0 80px;
  }

  .section-title h2 {
    font-size: 2rem;
  }

  .publication-item {
    flex-direction: column;
  }

  .publication-year {
    padding: 10px;
    text-align: center;
  }

  .award-item {
    flex-direction: column;
    text-align: center;
  }

  .award-icon {
    margin-right: 0;
    margin-bottom: 20px;
  }

  .contact-item {
    flex-direction: column;
    text-align: center;
  }

  .contact-icon {
    margin: 0 auto 20px;
  }

  .social-links {
    justify-content: center;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}

@media screen and (max-width: 576px) {
  .hero-text h1 {
    font-size: 2.5rem;
  }

  .career-desc {
    font-size: 1rem;
  }

  .hero-btns {
    flex-direction: column;
    gap: 10px;
  }

  .btn {
    width: 100%;
  }

  .download-cv {
    flex-direction: column;
  }

  .resume-nav {
    flex-direction: column;
  }

  .resume-tab {
    width: 100%;
  }
}